fix(s3): add delimiter option support for CSV files #561

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7ttp wants to merge 1 commit into supabase:main from 7ttp:fix/s3-csv-delimiter

7ttp commented Jan 20, 2026

Summary

Added support for custom CSV delimiter option in S3 FDW to handle CSV files with non comma delimiters.

Problem

S3 FDW only supported comma delimited CSV files. Users couldn't read CSV files with other delimiters like semicolons, tabs, or pipes.

Solution

Added csv_delimiter field to S3Fdw struct (defaults to comma)
Parse delimiter option from foreign table options during begin_scan
Pass custom delimiter to CSV reader builder when creating parser

Related

Closes s3_fdw CSV parser fails on header row with spaces in column names (byte 435 parsing error) supabase#42004


          fix(s3): add delimiter option support for CSV files

dd4ce90

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